president obama, mitt romney and the debate in denver everyone is talking about. >>> breaking news about american airlines. why dozens of planes in the air tonight are being grounded when they land. >>> out of gas. why some gas stations are shutting down in a place where prices are already over $5 a gallon. >>> is it a hien danger of chemical of plastics and cans are of high importance to mothers and their newborns. >>> and bird's eye view. what we look like to them. "nightly news" begins now. >>> from nbc news world headquarters in new york, this is "nbc nightly news" with brian williams. >>> good evening. they now estimate over 67 million of us watched the debate in denver last night and what people saw was a highly energized, motivated and combative mitt romney sharing the stage with a subdued and lackluster president obama. what they saw was mitt romney on his way over the course of 90 minutes to scoring a clear and consensus victory in what will be the first of three meetings. between these two men. for romney, today felt like a new chapter. here's a look at the crowd waiting for hi